Current tmio driver tries to use default ocr_avail
if 1) it couldn't find regulator and 2) if platform data
doesn't have ocr_mask.
But, there is no guarantee that regulator driver probe
is faster than TMIO driver probe.
TMIO driver will not use regulator in such case.
By this patch, TMIO driver returns -EPROBE_DEFER if it
couldn't find regulator and if platform doesn't have ocr_mask.
Because, there is possibility that regulator
has not been probed, but the user is expecting it.
This patch changes tmio_mmc_host_probe() behavior,
but there is no user who has conflict.
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@xxxxxxxxxxx>
---
drivers/mmc/host/tmio_mmc_pio.c | 21 ++++++++++++++++-----
1 file changed, 16 insertions(+), 5 deletions(-)
diff --git a/drivers/mmc/host/tmio_mmc_pio.c b/drivers/mmc/host/tmio_mmc_pio.c
index b380225..7b25d0e 100644
--- a/drivers/mmc/host/tmio_mmc_pio.c
+++ b/drivers/mmc/host/tmio_mmc_pio.c
@@ -944,17 +944,25 @@ static const struct mmc_host_ops tmio_mmc_ops = {
.enable_sdio_irq = tmio_mmc_enable_sdio_irq,
};
-static void tmio_mmc_init_ocr(struct tmio_mmc_host *host)
+static int tmio_mmc_init_ocr(struct tmio_mmc_host *host)
{
struct tmio_mmc_data *pdata = host->pdata;
struct mmc_host *mmc = host->mmc;
mmc_regulator_get_supply(mmc);
+ /* use ocr_mask if no regulator */
if (!mmc->ocr_avail)
- mmc->ocr_avail = pdata->ocr_mask ? : MMC_VDD_32_33 | MMC_VDD_33_34;
- else if (pdata->ocr_mask)
- dev_warn(mmc_dev(mmc), "Platform OCR mask is ignored\n");
+ mmc->ocr_avail = pdata->ocr_mask;
+
+ /*
+ * try again.
+ * There is possibility that regulator has not been probed
+ */
+ if (!mmc->ocr_avail)
+ return -EPROBE_DEFER;
+
+ return 0;
}
static void tmio_mmc_of_parse(struct platform_device *pdev,
@@ -1008,6 +1016,10 @@ int tmio_mmc_host_probe(struct tmio_mmc_host **host,
/* SD control register space size is 0x200, 0x400 for bus_shift=1 */
_host->bus_shift = resource_size(res_ctl) >> 10;
+ ret = tmio_mmc_init_ocr(_host);
+ if (ret < 0)
+ goto host_free;
+
_host->ctl = ioremap(res_ctl->start, resource_size(res_ctl));
if (!_host->ctl) {
ret = -ENOMEM;
@@ -1023,7 +1035,6 @@ int tmio_mmc_host_probe(struct tmio_mmc_host **host,
mmc->max_segs;
mmc->max_req_size = mmc->max_blk_size * mmc->max_blk_count;
mmc->max_seg_size = mmc->max_req_size;
- tmio_mmc_init_ocr(_host);
_host->native_hotplug = !(pdata->flags & TMIO_MMC_USE_GPIO_CD ||
mmc->caps & MMC_CAP_NEEDS_POLL ||
--
1.7.9.5
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